项目建设背景：汽车发动机进排气阀座是各种汽车发动机的主要部件，目前该产品国内汽车生产厂家大部分从国外进口。

Project Background: the inlet and outlet valve seats of auto engine are main components of various auto engines and internal auto manufacturers import the product mostly.

youdao

是国内发动机全金属气缸垫总成的专业生产厂家。

Specialize in all metal gasket assembly of domestic engine.

youdao